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Zalman ZM850-HP 850W PSU fan not working properly/no power to MB

Hi, my old Zalman PSU recently died and I have just received my new one (mentioned above). After having it installed it seems that 1. The psu fan isn't oscillating properly and 2. The motherboard is not getting any power. All other devices have power except the motherboard.

Does it sound like the PSU may be faulty? It is installed correctly but perhaps there was something missed with the MB? The fact that the fan seems a lil glitchy makes me worry.

Any suggestions or ideas are welcomed thanks.

update - after emailing Zalman I got this reply...

Thank you for using our product and sorry for your inconvenience.

Please check the cable connection status one more time. If the problem seems to be on the PSU itself, request RMA.

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